Presuming it happens, this would be the sixth year running that TBP will play the first full weekend of the New Year at the Bistro. (You can read my review of their appearance there this past January right here.)
As always with Pollstar listings, this should be considered unconfirmed until officially announced by the venue. However, given that the band and Jazz St. Louis both have expressed publicly an interest in keeping the string intact for the foreseeable future, I'd say this particular gig is as close to a certainty as is possible under the circumstances. We'll know for sure when Jazz St. Louis announces its season schedule, which, if past years are a reliable guide, should be happening fairly soon.